package com.ftx.dao.mysql;

import java.sql.*;

/**
 * Created by fengtingxin on 2019/5/28.
 */

public class MysqlDao {

    // JDBC 驱动名及数据库 URL
    static final String JDBC_DRIVER = "com.mysql.jdbc.Driver";
    static final String DB_URL = "jdbc:mysql://192.168.166.30:3359/fuwu_market";

    // 数据库的用户名与密码，需要根据自己的设置
    static final String USER = "pop_crm_rw";
    static final String PASS = "pop_crm_rw3ed";

    public static void main(String[] args) {
        Connection conn = null;
        Statement stmt = null;
        try{
            // 注册 JDBC 驱动
            Class.forName("com.mysql.jdbc.Driver");

            // 打开链接
            System.out.println("连接数据库...");
            conn = DriverManager.getConnection(DB_URL,USER,PASS);

            // 执行查询
            System.out.println("实例化Statement对象...");
            stmt = conn.createStatement();
            String sql;
            sql = "SELECT order_id, buyer, nick_name FROM fw_order limit 100";
            ResultSet rs = stmt.executeQuery(sql);

            // 展开结果集数据库
            while(rs.next()){
                // 通过字段检索
                Long orderId  = rs.getLong("order_id");
                String buyer = rs.getString("buyer");
                String nickName = rs.getString("nick_name");

                // 输出数据
                System.out.print("orderId: " + orderId);
                System.out.print(", buyer: " + buyer);
                System.out.print(", nickName: " + nickName);
                System.out.print("\n");
            }
            // 完成后关闭
            rs.close();
            stmt.close();
            conn.close();
        }catch(SQLException se){
            // 处理 JDBC 错误
            se.printStackTrace();
        }catch(Exception e){
            // 处理 Class.forName 错误
            e.printStackTrace();
        }finally{
            // 关闭资源
            try{
                if(stmt!=null) stmt.close();
            }catch(SQLException se2){
            }// 什么都不做
            try{
                if(conn!=null) conn.close();
            }catch(SQLException se){
                se.printStackTrace();
            }
        }
        System.out.println("Goodbye!");
    }

}
